Leger compiled the study by polling 20,000 Ontario residents. Each retailer included in the survey was assessed by 400 recent customers over the age of 15, with the results weighted to ensure a representative selection by gender, age and region. It polled respondents on different elements of their experience with the retailer – ranging from price and product selection to store layout, personalization options and staff service – and used those answers to calculate an index score for each retailer.